应急辐射防护用定向剂量当量率仪研制

辐射防护 ›› 2023, Vol. 43 ›› Issue (5): 467-472.

应急辐射防护用定向剂量当量率仪研制

韦应靖^1,2,3, 吴志芳^1,3, 刘立业², 李胤², 魏世量², 延军²

1.清华大学核能与新能源技术研究院,北京 100084;
2.中国辐射防护研究院辐射安全与防护山西省重点实验室,太原 030006;
3.核检测技术北京市重点实验室,北京 100084

收稿日期:2022-09-13 出版日期:2023-09-20 发布日期:2023-11-06
作者简介:韦应靖(1980—),男,2004年毕业于兰州大学核物理专业,2009年毕业于中国辐射防护研究院辐射防护及环境保护专业,获硕士学位,现为清华大学能源动力专业在读博士研究生,研究员。E-mail:weiyj531@sina.com

Development of directional dose equivalent rate meter for emergency radiation protection

WEI Yingjing^1,2,3, WU Zhifang^1,3, LIU Liye², LI Yin², WEI Shiliang², YAN Jun²

1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084;
2. Shanxi Key Laboratory for Radiation Safety and Protection , China Institute for radiation protection, Taiyuan 030006;
3. Beijing Key Laboratory on Nuclear Detection & Measurement Technology, Beijing 100084

Received:2022-09-13 Online:2023-09-20 Published:2023-11-06

摘要/Abstract

摘要： 为了准确测量应急条件下的场所H'·(0.07)数值,基于塑料闪烁体半导体光电二极管(SiPM),研制了一种应急辐射防护用定向剂量当量率仪。分别选取2层3 μm的镀铝聚酯膜、厚度50 μm和直径35 mm的塑料闪烁体、厚度5 mm的有机玻璃及SiPM,依次作为探测器的前窗、闪烁体、光导和光电转换器件。对于研制的应急辐射防护用定向剂量当量率仪,按照GB/T 4835.2—2013测得其辐射特性如下:在70 μSv/h~1.7 Sv/h剂量率范围内,其相对固有误差在-14%~+20%范围内;在β射线平均能量为60~800 keV辐射中,在0~±60°入射时,测得响应随β辐射能量和入射角的变化在-16% ~+ 48%范围内;在0.24 mSv/h辐射场中测量结果的统计涨落为8.4%。测试结果表明,该应急辐射防护用定向剂量当量率仪的辐射特性均满足GB/T 4835.2—2013中要求,可用于较高弱贯穿辐射场所和应急条件下的定向剂量当量率监测。

关键词: 应急辐射防护, 弱贯穿辐射, H'·(0.07), 塑料闪烁体, SiPM

Abstract: In order to accurately measure the H'·(0.07) under emergency conditions, a directional dose equivalent rate meter for emergency radiation protection is developed. The detector conta: 2 layers 3 μm alumini polyester film, a diameter of 35 mm Plastic scintillators with thickness of 50 μm, plexiglass with a thickness of 5 mm, and SiPM. They were used as the front window, scintillator, photoconductive and photoelectric converter of the detector in turn. According to GB/T 4835.2—2013, the radiation characteristics of the developed directional dose equivalent rate meter for emergency radiation protection are as follows: the relative intrinsic error is -14% to +20% in the dose rate range of 70 μSv/h-1.7 Sv/h; With the incident angle from 0 to ±60°, and the β ray average energy of 60 keV-800 keV, the variation of radiation energy and incident angle is in the range of -16% to +48%; in the radiation field of 0.23 mSv/h, the statistical fluctuation of the measurement results is 8.4%. The test results show that the radiation characteristics of the directional dose equivalent rate meter for emergency radiation protection meet the requirements of GB/T 4835.2—2013, and can be used for directional dose equivalent rate monitoring in places with high weak penetrating radiation and emergency conditions.

Key words: emergency radiation protection, weak penetrating radiation, H'·(0.07), plastic scintillator, SiPM

中图分类号:

韦应靖, 吴志芳, 刘立业, 李胤, 魏世量, 延军. 应急辐射防护用定向剂量当量率仪研制[J]. 辐射防护, 2023, 43(5): 467-472.

WEI Yingjing, WU Zhifang, LIU Liye, LI Yin, WEI Shiliang, YAN Jun. Development of directional dose equivalent rate meter for emergency radiation protection[J]. RADIATION PROTECTION, 2023, 43(5): 467-472.

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